*** Its like Real Nature you never seen under Cave******
Hang Son Doong Cave which is 5km long lies in Vietnam has its own Climate,rivers,forests etc.
The Cave is 200m high and 150m wide was founded in 1991.
Only in 2009 did the cave become internationally known after a group of scientists from the British Cave Research Association, led by Howard and Deb Limbert, conducted a survey in Phong Nha-Ke Bang from 10 to 14 April 2009.
Their progress was stopped by a large, 60-metre (200 ft) high calcite wall, which was named The Great Wall of Vietnam. It was traversed in 2010 when the group reached the end of the cave passage.
The cave contains some of the tallest known stalagmites in the world.
The cave runs for approximately 9 km and is punctuated by 2 large dolines.
The dolines allow sunlight to enter sections of the cave and has resulted in the growth of trees as well as other vegetation.
The first tourist group explored the cave on a guided tour at a cost of US$3,000 each.
On 2015 season, Only 500 permits were issued, which runs from February to August.
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